Chapter 4
Configuration
MAN_105G_1.5
Page
48
The block mapping message can be sent at a real-time by setting the “Period” value. In this
example, “period” is set to 6 minutes - the message will be sent every 6 minutes starting at
the beginning of each hour. That is, the message will be sent at XX:00, XX:06, XX:12,
XX:18, XX:24 …. XX:54 - where XX represents any hour of the day.
If “Period” was set to 1 minute, then the message would be sent every minute, on the minute.
The “Offset” value provides an offset to the specified time. In this example, if the “Offset”
was set to 10 seconds, then the messages will be sent 10 seconds later - at XX:00:10,
XX:06:10, XX:12:10 etc.
The reason for the offset is to stagger messages with the same time setting. For example, if
you configure 5 block mappings all to be sent at 10 minutes, then the 105G will try to send
these messages at the same time - some of the messages will have to wait until the earlier
messages have been sent. If you are sending Read messages as well as Write messages, then
the return messages could clash with outgoing messages.
To avoid this, you can delay some messages using the Offset feature. For example, if you
have 5 mappings to be sent at 10 minutes, then the first could have zero offset, the second 3
sec offset, the third 6 sec offset etc.
If you do not wish to have a real-time trigger, set “Period” to continuous.
If you want the block mapping to be sent only on real-time (and not on change as well),
select the “Disable” box in the bottom left hand corner - this disables change messages for
this block mapping.
Setting the Clock
The clock within the 105G can be set by the host device, and read by the host device. The
105G provides four clock registers for days/hours/minutes/seconds - these are registers 4330
– 4333. On start-up, these registers are set to zero. Reg 4333 increments each second, Reg
4332 increments each minute, Reg 4331 each hour and Reg 4330 each day.
